Chapter 3

Question 1

what are the 7 diatomic elements?

Answer 1

H2
N2
F2
O2
I2
Cl2
Br2

Have no fear of ice cold beer

or

Horses need oats for clear brown I’s

Question 2

An ionic compound is always a combination of:

Answer 2

metal cation + nonmetal anion

[in a crystal lattice]

Question 3

Covalent compounds are a combination of:

Answer 3

2+ non-metals

Ex) H2O

Question 4

Identify the rule for naming ionic compounds

Answer 4

name of metal cation

+ non-metal anion ending with “-ide”

Question 5

LiBr is what kind of compound?
Identify the full name

Answer 5

ionic

Lithium Bromide

Question 6

What charge does calcium form?

Answer 6

+2

Question 7

NaCl is

Answer 7

Sodium chloride

Question 8

CaCl2 is:

Answer 8

calcium chloride

Question 9

ionic compounds are always net __________

Answer 9

neutral

Question 10

AlF3 is:

Answer 10

aluminum fluoride

Question 11

CuCl is:

Answer 11

Copper (I) Chloride

Question 12

CuCl2 is:

Answer 12

Copper (II) Chloride

Question 13

Nomenclature rule for transition metals:

Answer 13

name of metal cation

add roman numeral for metal charge

+ non-metal anion ending with “-ide”

Question 14

Au2O3 is:

Answer 14

Gold (III) Oxide

Question 15

Ionic compounds are stable and do not melt until:

Answer 15

temperature reach thousands of degrees (C)

Question 16

Covalent compounds usually react and decompose at:

Answer 16

much lower temperatures than ionic compounds, especially also when exposed to oxygen

Question 17

Most ionic compounds readily fall apart into individual cations and anions as they:

Answer 17

dissolve in water at room temp

Question 18

Covalent compounds remain as ________ __________ even when dissolved

Answer 18

intact molecules

Question 19

When an ____________ is dissolved in water, individual ions can carry charge and complete circuits

Answer 19

electrolytes

Question 20

___________ ions are the most stable version of many elements on planet earth out in nature

Answer 20

polyatomic

Question 21

Polyatomic ions are not stable on their own and must be combined with:

Answer 21

a counter ion until they are net neutral

Question 22

covalent compounds are also called-

Answer 22

molecular compounds

Question 23

NO2 is :

Answer 23

nitrogen dioxide

Question 24

Rule for naming covalent compounds:

Answer 24

prefix-element
prefix- element, -ide

skip prefix if first element is 1

Question 25

H + a non-metal is:

Answer 25

binary acid

Question 26

Rule for naming binary acids:

Answer 26

start with hydro
throw in part of element name
change ending to -ic acid

Question 27

_______ have an oxygen, hydrogen, + usually 1 non-metal

Answer 27

oxyacids

Question 28

Polyatomic ions-

Halogen + Oxygen all have what charge?

Answer 28

-1

Question 29

For oxyacids, nomenclature rule is

-ate ending change to-
-ite ending change to-

Answer 29

-ate ending change to- -ic acid
-ite ending change to- -ous acid

Question 30

what are the 8 prefixes to molecules ?

1-8

Answer 30

1. mono-
   2 di-
   3 tri-
   4 tetra-
   5 penta-
   6 hexa-
   7 hepta-
   8 octa-
   9 nona-
   10 deca-